Lung cancer and back pain can be linked, usually when a patient has metastatic lung cancer spreading outside the margins of the lungs. Sometimes, back pain is an early warning sign before a tumor has had an opportunity to grow large, depending on the placement of the growth. Back pain may occur with or without other lung cancer symptoms like bloody sputum and difficulty breathing. Patients being evaluated and treated for lung cancer should make sure to report all symptoms and side effects, as sometimes they provide important clues for medical care providers.

When a cancer gets especially large and starts putting pressure on the tissue of the lung, back and shoulder pain can develop. Usually, the pain gets worse when the patient breathes deeply. Metastatic cancers growing beyond the lungs can also start to cause back pain by putting pressure on nerves. While lung cancer and back pain can be associated, this is not always the case. People can have back pain for numerous reasons and lung cancer symptoms are not always consistent.

In the case of lung cancer and back pain, the back pain does not improve when the patient takes logical steps to treat it. Chiropractic adjustments are ineffective, as are rest, ice, and heat. Patients may adjust activity levels and lifting habits, but still have back pain. Pain management medications will block the pain signals and bring temporary relief, but the pain will return, and it can increase over time as the tumor grows.

Patients who notice back pain in association with difficulty breathing, fatigue, and bloody sputum may want to be evaluated for lung cancer. Lung cancer and back pain can be more common in people with occupational exposure from construction and mining, as these individuals may have prior back injuries from work that flare up as the tumor grows. These individuals can also be more likely to attribute the pain to the old injury, not noticing changes in the pain indicative of a different cause.

While lung cancer and back pain are often characteristic of metastatic cancer, this is not always true. A patient being evaluated for lung cancer who has been experiencing back pain should not assume the worst. Medical screening will be needed to learn more about the nature of the cancer and to develop an appropriate treatment plan, based on the stage of the cancer, the patient's general level of health, and the goals for treatment.